// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: depcache.cc,v 1.25 2001/05/27 05:36:04 jgg Exp $ /* ###################################################################### Dependency Cache - Caches Dependency information. ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ #ifdef __GNUG__ #pragma implementation "apt-pkg/depcache.h" #endif #include <apt-pkg/depcache.h> #include <apt-pkg/version.h> #include <apt-pkg/error.h> #include <apt-pkg/sptr.h> #include <apt-pkg/algorithms.h> #include <apti18n.h> /*}}}*/ // DepCache::pkgDepCache - Constructors /*{{{*/ // --------------------------------------------------------------------- /* */ pkgDepCache::pkgDepCache(pkgCache *pCache,Policy *Plcy) : Cache(pCache), PkgState(0), DepState(0) { delLocalPolicy = 0; LocalPolicy = Plcy; if (LocalPolicy == 0) delLocalPolicy = LocalPolicy = new Policy; } /*}}}*/ // DepCache::~pkgDepCache - Destructor /*{{{*/ // --------------------------------------------------------------------- /* */ pkgDepCache::~pkgDepCache() { delete [] PkgState; delete [] DepState; delete delLocalPolicy; } /*}}}*/ // DepCache::Init - Generate the initial extra structures. /*{{{*/ // --------------------------------------------------------------------- /* This allocats the extension buffers and initializes them. */ bool pkgDepCache::Init(OpProgress *Prog) { delete [] PkgState; delete [] DepState; PkgState = new StateCache[Head().PackageCount]; DepState = new unsigned char[Head().DependsCount]; memset(PkgState,0,sizeof(*PkgState)*Head().PackageCount); memset(DepState,0,sizeof(*DepState)*Head().DependsCount); if (Prog != 0) { Prog->OverallProgress(0,2*Head().PackageCount,Head().PackageCount, _("Building dependency tree")); Prog->SubProgress(Head().PackageCount,_("Candidate versions")); } /* Set the current state of everything. In this state all of the packages are kept exactly as is. See AllUpgrade */ int Done = 0; for (PkgIterator I = PkgBegin(); I.end() != true; I++,Done++) { if (Prog != 0) Prog->Progress(Done); // Find the proper cache slot StateCache &State = PkgState[I->ID]; State.iFlags = 0; // Figure out the install version State.CandidateVer = GetCandidateVer(I); State.InstallVer = I.CurrentVer(); State.Mode = ModeKeep; State.Update(I,*this); } if (Prog != 0) { Prog->OverallProgress(Head().PackageCount,2*Head().PackageCount, Head().PackageCount, _("Building dependency tree")); Prog->SubProgress(Head().PackageCount,_("Dependency generation")); } Update(Prog); if(Prog != 0) Prog->Done(); return true; } /*}}}*/ // DepCache::CheckDep - Checks a single dependency /*{{{*/ // --------------------------------------------------------------------- /* This first checks the dependency against the main target package and then walks along the package provides list and checks if each provides will be installed then checks the provides against the dep. Res will be set to the package which was used to satisfy the dep. */ bool pkgDepCache::CheckDep(DepIterator Dep,int Type,PkgIterator &Res) { Res = Dep.TargetPkg(); /* Check simple depends. A depends -should- never self match but we allow it anyhow because dpkg does. Technically it is a packaging bug. Conflicts may never self match */ if (Dep.TargetPkg() != Dep.ParentPkg() || (Dep->Type != Dep::Conflicts && Dep->Type != Dep::Obsoletes)) { PkgIterator Pkg = Dep.TargetPkg(); // Check the base package if (Type == NowVersion && Pkg->CurrentVer != 0) if (VS().CheckDep(Pkg.CurrentVer().VerStr(),Dep->CompareOp, Dep.TargetVer()) == true) return true; if (Type == InstallVersion && PkgState[Pkg->ID].InstallVer != 0) if (VS().CheckDep(PkgState[Pkg->ID].InstVerIter(*this).VerStr(), Dep->CompareOp,Dep.TargetVer()) == true) return true; if (Type == CandidateVersion && PkgState[Pkg->ID].CandidateVer != 0) if (VS().CheckDep(PkgState[Pkg->ID].CandidateVerIter(*this).VerStr(), Dep->CompareOp,Dep.TargetVer()) == true) return true; } if (Dep->Type == Dep::Obsoletes) return false; // Check the providing packages PrvIterator P = Dep.TargetPkg().ProvidesList(); PkgIterator Pkg = Dep.ParentPkg(); for (; P.end() != true; P++) { /* Provides may never be applied against the same package if it is a conflicts. See the comment above. */ if (P.OwnerPkg() == Pkg && Dep->Type == Dep::Conflicts) continue; // Check if the provides is a hit if (Type == NowVersion) { if (P.OwnerPkg().CurrentVer() != P.OwnerVer()) continue; } if (Type == InstallVersion) { StateCache &State = PkgState[P.OwnerPkg()->ID]; if (State.InstallVer != (Version *)P.OwnerVer()) continue; } if (Type == CandidateVersion) { StateCache &State = PkgState[P.OwnerPkg()->ID]; if (State.CandidateVer != (Version *)P.OwnerVer()) continue; } // Compare the versions. if (VS().CheckDep(P.ProvideVersion(),Dep->CompareOp,Dep.TargetVer()) == true) { Res = P.OwnerPkg(); return true; } } return false; } /*}}}*/ // DepCache::AddSizes - Add the packages sizes to the counters /*{{{*/ // --------------------------------------------------------------------- /* Call with Mult = -1 to preform the inverse opration */ void pkgDepCache::AddSizes(const PkgIterator &Pkg,signed long Mult) { StateCache &P = PkgState[Pkg->ID]; if (Pkg->VersionList == 0) return; if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure && P.Keep() == true) return; // Compute the size data if (P.NewInstall() == true) { iUsrSize += (signed)(Mult*P.InstVerIter(*this)->InstalledSize); iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size); return; } // Upgrading if (Pkg->CurrentVer != 0 && (P.InstallVer != (Version *)Pkg.CurrentVer() || (P.iFlags & ReInstall) == ReInstall) && P.InstallVer != 0) { iUsrSize += (signed)(Mult*((signed)P.InstVerIter(*this)->InstalledSize - (signed)Pkg.CurrentVer()->InstalledSize)); iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size); return; } // Reinstall if (Pkg.State() == pkgCache::PkgIterator::NeedsUnpack && P.Delete() == false) { iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size); return; } // Removing if (Pkg->CurrentVer != 0 && P.InstallVer == 0) { iUsrSize -= (signed)(Mult*Pkg.CurrentVer()->InstalledSize); return; } } /*}}}*/ // DepCache::AddStates - Add the package to the state counter /*{{{*/ // --------------------------------------------------------------------- /* This routine is tricky to use, you must make sure that it is never called twice for the same package. This means the Remove/Add section should be as short as possible and not encompass any code that will calld Remove/Add itself. Remember, dependencies can be circular so while processing a dep for Pkg it is possible that Add/Remove will be called on Pkg */ void pkgDepCache::AddStates(const PkgIterator &Pkg,int Add) { StateCache &State = PkgState[Pkg->ID]; // The Package is broken if ((State.DepState & DepInstMin) != DepInstMin) iBrokenCount += Add; // Bad state if (Pkg.State() != PkgIterator::NeedsNothing) iBadCount += Add; // Not installed if (Pkg->CurrentVer == 0) { if (State.Mode == ModeDelete && (State.iFlags | Purge) == Purge && Pkg.Purge() == false) iDelCount += Add; if (State.Mode == ModeInstall) iInstCount += Add; return; } // Installed, no upgrade if (State.Status == 0) { if (State.Mode == ModeDelete) iDelCount += Add; else if ((State.iFlags & ReInstall) == ReInstall) iInstCount += Add; return; } // Alll 3 are possible if (State.Mode == ModeDelete) iDelCount += Add; if (State.Mode == ModeKeep) iKeepCount += Add; if (State.Mode == ModeInstall) iInstCount += Add; } /*}}}*/ // DepCache::BuildGroupOrs - Generate the Or group dep data /*{{{*/ // --------------------------------------------------------------------- /* The or group results are stored in the last item of the or group. This allows easy detection of the state of a whole or'd group. */ void pkgDepCache::BuildGroupOrs(VerIterator const &V) { unsigned char Group = 0; for (DepIterator D = V.DependsList(); D.end() != true; D++) { // Build the dependency state. unsigned char &State = DepState[D->ID]; /* Invert for Conflicts. We have to do this twice to get the right sense for a conflicts group */ if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes) State = ~State; // Add to the group if we are within an or.. State &= 0x7; Group |= State; State |= Group << 3; if ((D->CompareOp & Dep::Or) != Dep::Or) Group = 0; // Invert for Conflicts if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes) State = ~State; } } /*}}}*/ // DepCache::VersionState - Perform a pass over a dependency list /*{{{*/ // --------------------------------------------------------------------- /* This is used to run over a dependency list and determine the dep state of the list, filtering it through both a Min check and a Policy check. The return result will have SetMin/SetPolicy low if a check fails. It uses the DepState cache for it's computations. */ unsigned char pkgDepCache::VersionState(DepIterator D,unsigned char Check, unsigned char SetMin, unsigned char SetPolicy) { unsigned char Dep = 0xFF; while (D.end() != true) { // Compute a single dependency element (glob or) DepIterator Start = D; unsigned char State = 0; for (bool LastOR = true; D.end() == false && LastOR == true; D++) { State |= DepState[D->ID]; LastOR = (D->CompareOp & Dep::Or) == Dep::Or; } // Minimum deps that must be satisfied to have a working package if (Start.IsCritical() == true) if ((State & Check) != Check) Dep &= ~SetMin; // Policy deps that must be satisfied to install the package if (IsImportantDep(Start) == true && (State & Check) != Check) Dep &= ~SetPolicy; } return Dep; } /*}}}*/ // DepCache::DependencyState - Compute the 3 results for a dep /*{{{*/ // --------------------------------------------------------------------- /* This is the main dependency computation bit. It computes the 3 main results for a dependencys, Now, Install and Candidate. Callers must invert the result if dealing with conflicts. */ unsigned char pkgDepCache::DependencyState(DepIterator &D) { unsigned char State = 0; if (CheckDep(D,NowVersion) == true) State |= DepNow; if (CheckDep(D,InstallVersion) == true) State |= DepInstall; if (CheckDep(D,CandidateVersion) == true) State |= DepCVer; return State; } /*}}}*/ // DepCache::UpdateVerState - Compute the Dep member of the state /*{{{*/ // --------------------------------------------------------------------- /* This determines the combined dependency representation of a package for its two states now and install. This is done by using the pre-generated dependency information. */ void pkgDepCache::UpdateVerState(PkgIterator Pkg) { // Empty deps are always true StateCache &State = PkgState[Pkg->ID]; State.DepState = 0xFF; // Check the Current state if (Pkg->CurrentVer != 0) { DepIterator D = Pkg.CurrentVer().DependsList(); State.DepState &= VersionState(D,DepNow,DepNowMin,DepNowPolicy); } /* Check the candidate state. We do not compare against the whole as a candidate state but check the candidate version against the install states */ if (State.CandidateVer != 0) { DepIterator D = State.CandidateVerIter(*this).DependsList(); State.DepState &= VersionState(D,DepInstall,DepCandMin,DepCandPolicy); } // Check target state which can only be current or installed if (State.InstallVer != 0) { DepIterator D = State.InstVerIter(*this).DependsList(); State.DepState &= VersionState(D,DepInstall,DepInstMin,DepInstPolicy); } } /*}}}*/ // DepCache::Update - Figure out all the state information /*{{{*/ // --------------------------------------------------------------------- /* This will figure out the state of all the packages and all the dependencies based on the current policy. */ void pkgDepCache::Update(OpProgress *Prog) { iUsrSize = 0; iDownloadSize = 0; iDelCount = 0; iInstCount = 0; iKeepCount = 0; iBrokenCount = 0; iBadCount = 0; // Perform the depends pass int Done = 0; for (PkgIterator I = PkgBegin(); I.end() != true; I++,Done++) { if (Prog != 0 && Done%20 == 0) Prog->Progress(Done); for (VerIterator V = I.VersionList(); V.end() != true; V++) { unsigned char Group = 0; for (DepIterator D = V.DependsList(); D.end() != true; D++) { // Build the dependency state. unsigned char &State = DepState[D->ID]; State = DependencyState(D); // Add to the group if we are within an or.. Group |= State; State |= Group << 3; if ((D->CompareOp & Dep::Or) != Dep::Or) Group = 0; // Invert for Conflicts if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes) State = ~State; } } // Compute the pacakge dependency state and size additions AddSizes(I); UpdateVerState(I); AddStates(I); } if (Prog != 0) Prog->Progress(Done); } /*}}}*/ // DepCache::Update - Update the deps list of a package /*{{{*/ // --------------------------------------------------------------------- /* This is a helper for update that only does the dep portion of the scan. It is mainly ment to scan reverse dependencies. */ void pkgDepCache::Update(DepIterator D) { // Update the reverse deps for (;D.end() != true; D++) { unsigned char &State = DepState[D->ID]; State = DependencyState(D); // Invert for Conflicts if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes) State = ~State; RemoveStates(D.ParentPkg()); BuildGroupOrs(D.ParentVer()); UpdateVerState(D.ParentPkg()); AddStates(D.ParentPkg()); } } /*}}}*/ // DepCache::Update - Update the related deps of a package /*{{{*/ // --------------------------------------------------------------------- /* This is called whenever the state of a package changes. It updates all cached dependencies related to this package. */ void pkgDepCache::Update(PkgIterator const &Pkg) { // Recompute the dep of the package RemoveStates(Pkg); UpdateVerState(Pkg); AddStates(Pkg); // Update the reverse deps Update(Pkg.RevDependsList()); // Update the provides map for the current ver if (Pkg->CurrentVer != 0) for (PrvIterator P = Pkg.CurrentVer().ProvidesList(); P.end() != true; P++) Update(P.ParentPkg().RevDependsList()); // Update the provides map for the candidate ver if (PkgState[Pkg->ID].CandidateVer != 0) for (PrvIterator P = PkgState[Pkg->ID].CandidateVerIter(*this).ProvidesList(); P.end() != true; P++) Update(P.ParentPkg().RevDependsList()); } /*}}}*/ // DepCache::MarkKeep - Put the package in the keep state /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::MarkKeep(PkgIterator const &Pkg,bool Soft) { // Simplifies other routines. if (Pkg.end() == true) return; /* Reject an attempt to keep a non-source broken installed package, those must be upgraded */ if (Pkg.State() == PkgIterator::NeedsUnpack && Pkg.CurrentVer().Downloadable() == false) return; /* We changed the soft state all the time so the UI is a bit nicer to use */ StateCache &P = PkgState[Pkg->ID]; if (Soft == true) P.iFlags |= AutoKept; else P.iFlags &= ~AutoKept; // Check that it is not already kept if (P.Mode == ModeKeep) return; // We dont even try to keep virtual packages.. if (Pkg->VersionList == 0) return; P.Flags &= ~Flag::Auto; RemoveSizes(Pkg); RemoveStates(Pkg); P.Mode = ModeKeep; if (Pkg->CurrentVer == 0) P.InstallVer = 0; else P.InstallVer = Pkg.CurrentVer(); AddStates(Pkg); Update(Pkg); AddSizes(Pkg); } /*}}}*/ // DepCache::MarkDelete - Put the package in the delete state /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge) { // Simplifies other routines. if (Pkg.end() == true) return; // Check that it is not already marked for delete StateCache &P = PkgState[Pkg->ID]; P.iFlags &= ~(AutoKept | Purge); if (rPurge == true) P.iFlags |= Purge; if ((P.Mode == ModeDelete || P.InstallVer == 0) && (Pkg.Purge() == true || rPurge == false)) return; // We dont even try to delete virtual packages.. if (Pkg->VersionList == 0) return; RemoveSizes(Pkg); RemoveStates(Pkg); if (Pkg->CurrentVer == 0 && (Pkg.Purge() == true || rPurge == false)) P.Mode = ModeKeep; else P.Mode = ModeDelete; P.InstallVer = 0; P.Flags &= Flag::Auto; AddStates(Pkg); Update(Pkg); AddSizes(Pkg); } /*}}}*/ // DepCache::MarkInstall - Put the package in the install state /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst, unsigned long Depth) { if (Depth > 100) return; // Simplifies other routines. if (Pkg.end() == true) return; /* Check that it is not already marked for install and that it can be installed */ StateCache &P = PkgState[Pkg->ID]; P.iFlags &= ~AutoKept; if (P.InstBroken() == false && (P.Mode == ModeInstall || P.CandidateVer == (Version *)Pkg.CurrentVer())) { if (P.CandidateVer == (Version *)Pkg.CurrentVer() && P.InstallVer == 0) MarkKeep(Pkg); return; } // See if there is even any possible instalation candidate if (P.CandidateVer == 0) return; // We dont even try to install virtual packages.. if (Pkg->VersionList == 0) return; /* Target the candidate version and remove the autoflag. We reset the autoflag below if this was called recursively. Otherwise the user should have the ability to de-auto a package by changing its state */ RemoveSizes(Pkg); RemoveStates(Pkg); P.Mode = ModeInstall; P.InstallVer = P.CandidateVer; P.Flags &= ~Flag::Auto; if (P.CandidateVer == (Version *)Pkg.CurrentVer()) P.Mode = ModeKeep; AddStates(Pkg); Update(Pkg); AddSizes(Pkg); if (AutoInst == false) return; DepIterator Dep = P.InstVerIter(*this).DependsList(); for (; Dep.end() != true;) { // Grok or groups DepIterator Start = Dep; bool Result = true; unsigned Ors = 0; for (bool LastOR = true; Dep.end() == false && LastOR == true; Dep++,Ors++) { LastOR = (Dep->CompareOp & Dep::Or) == Dep::Or; if ((DepState[Dep->ID] & DepInstall) == DepInstall) Result = false; } // Dep is satisfied okay. if (Result == false) continue; /* Check if this dep should be consider for install. If it is a user defined important dep and we are installed a new package then it will be installed. Otherwise we only worry about critical deps */ if (IsImportantDep(Start) == false) continue; if (Pkg->CurrentVer != 0 && Start.IsCritical() == false) continue; /* If we are in an or group locate the first or that can succeed. We have already cached this.. */ for (; Ors > 1 && (DepState[Start->ID] & DepCVer) != DepCVer; Ors--) Start++; /* This bit is for processing the possibilty of an install/upgrade fixing the problem */ SPtrArray<Version *> List = Start.AllTargets(); if ((DepState[Start->ID] & DepCVer) == DepCVer) { // Right, find the best version to install.. Version **Cur = List; PkgIterator P = Start.TargetPkg(); PkgIterator InstPkg(*Cache,0); // See if there are direct matches (at the start of the list) for (; *Cur != 0 && (*Cur)->ParentPkg == P.Index(); Cur++) { PkgIterator Pkg(*Cache,Cache->PkgP + (*Cur)->ParentPkg); if (PkgState[Pkg->ID].CandidateVer != *Cur) continue; InstPkg = Pkg; break; } // Select the highest priority providing package if (InstPkg.end() == true) { pkgPrioSortList(*Cache,Cur); for (; *Cur != 0; Cur++) { PkgIterator Pkg(*Cache,Cache->PkgP + (*Cur)->ParentPkg); if (PkgState[Pkg->ID].CandidateVer != *Cur) continue; InstPkg = Pkg; break; } } if (InstPkg.end() == false) { MarkInstall(InstPkg,true,Depth + 1); // Set the autoflag, after MarkInstall because MarkInstall unsets it if (P->CurrentVer == 0) PkgState[InstPkg->ID].Flags |= Flag::Auto; } continue; } /* For conflicts we just de-install the package and mark as auto, Conflicts may not have or groups */ if (Start->Type == Dep::Conflicts || Start->Type == Dep::Obsoletes) { for (Version **I = List; *I != 0; I++) { VerIterator Ver(*this,*I); PkgIterator Pkg = Ver.ParentPkg(); MarkDelete(Pkg); PkgState[Pkg->ID].Flags |= Flag::Auto; } continue; } } } /*}}}*/ // DepCache::SetReInstall - Set the reinstallation flag /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::SetReInstall(PkgIterator const &Pkg,bool To) { RemoveSizes(Pkg); RemoveStates(Pkg); StateCache &P = PkgState[Pkg->ID]; if (To == true) P.iFlags |= ReInstall; else P.iFlags &= ~ReInstall; AddStates(Pkg); AddSizes(Pkg); } /*}}}*/ // DepCache::SetCandidateVersion - Change the candidate version /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::SetCandidateVersion(VerIterator TargetVer) { pkgCache::PkgIterator Pkg = TargetVer.ParentPkg(); StateCache &P = PkgState[Pkg->ID]; RemoveSizes(Pkg); RemoveStates(Pkg); if (P.CandidateVer == P.InstallVer) P.InstallVer = (Version *)TargetVer; P.CandidateVer = (Version *)TargetVer; P.Update(Pkg,*this); AddStates(Pkg); Update(Pkg); AddSizes(Pkg); } /*}}}*/ // StateCache::Update - Compute the various static display things /*{{{*/ // --------------------------------------------------------------------- /* This is called whenever the Candidate version changes. */ void pkgDepCache::StateCache::Update(PkgIterator Pkg,pkgCache &Cache) { // Some info VerIterator Ver = CandidateVerIter(Cache); // Use a null string or the version string if (Ver.end() == true) CandVersion = ""; else CandVersion = Ver.VerStr(); // Find the current version CurVersion = ""; if (Pkg->CurrentVer != 0) CurVersion = Pkg.CurrentVer().VerStr(); // Strip off the epochs for display CurVersion = StripEpoch(CurVersion); CandVersion = StripEpoch(CandVersion); // Figure out if its up or down or equal Status = Ver.CompareVer(Pkg.CurrentVer()); if (Pkg->CurrentVer == 0 || Pkg->VersionList == 0 || CandidateVer == 0) Status = 2; } /*}}}*/ // StateCache::StripEpoch - Remove the epoch specifier from the version /*{{{*/ // --------------------------------------------------------------------- /* */ const char *pkgDepCache::StateCache::StripEpoch(const char *Ver) { if (Ver == 0) return 0; // Strip any epoch for (const char *I = Ver; *I != 0; I++) if (*I == ':') return I + 1; return Ver; } /*}}}*/ // Policy::GetCandidateVer - Returns the Candidate install version /*{{{*/ // --------------------------------------------------------------------- /* The default just returns the highest available version that is not a source and automatic. */ pkgCache::VerIterator pkgDepCache::Policy::GetCandidateVer(PkgIterator Pkg) { /* Not source/not automatic versions cannot be a candidate version unless they are already installed */ VerIterator Last(*(pkgCache *)this,0); for (VerIterator I = Pkg.VersionList(); I.end() == false; I++) { if (Pkg.CurrentVer() == I) return I; for (VerFileIterator J = I.FileList(); J.end() == false; J++) { if ((J.File()->Flags & Flag::NotSource) != 0) continue; /* Stash the highest version of a not-automatic source, we use it if there is nothing better */ if ((J.File()->Flags & Flag::NotAutomatic) != 0) { if (Last.end() == true) Last = I; continue; } return I; } } return Last; } /*}}}*/ // Policy::IsImportantDep - True if the dependency is important /*{{{*/ // --------------------------------------------------------------------- /* */ bool pkgDepCache::Policy::IsImportantDep(DepIterator Dep) { return Dep.IsCritical(); } /*}}}*/